Cannabis Use Disorder Linked to Lower Pancreatic Cancer Detection in Pancreatitis Patients | Research

The takeaway

Among patients with chronic pancreatitis, cannabis use disorder was associated with a 74% lower rate of pancreatic cancer detection but a slight increase in acute flare-ups.

Gastroenterologists, pancreatic cancer researchers, cannabinoid oncology researchers

What the researchers found

After propensity score matching (6,858 per group), CUD was associated with significantly reduced pancreatic cancer detection (67 vs. 274 cases; HR 0.263, 95% CI 0.202-0.344, p<0.001) but a modest increase in acute pancreatitis flare risk (HR 1.102, 95% CI 1.043-1.166, p=0.001). Results were consistent in sensitivity analysis adjusting for opioid use disorder.

Why it matters

Chronic pancreatitis patients face elevated pancreatic cancer risk. If cannabis use truly reduces that risk, it could inform chemoprevention strategies — though the finding may also reflect differences in detection or follow-up.

The numbers in context

10,864 CUD patients and 42,160 controls before matching; 6,858 per group after matching. PC: 67 vs. 274 cases (HR 0.263). AP flares: HR 1.102. Mean follow-up shorter in CUD (736±422 vs 896±368 days).

How the study worked

Retrospective cohort study using TriNetX database identifying adults with chronic pancreatitis stratified by CUD status. Propensity score matching (1:1) for demographics, behavioral factors, and comorbidities. Cox proportional hazards regression for primary (PC incidence) and secondary (AP flare) outcomes.

What this study cannot tell us

Retrospective database study with inherent coding biases. Shorter follow-up in CUD group may miss later cancers. 'Detection' during follow-up differs from true incidence. Cannot determine mechanism. CUD is not equivalent to all cannabis use.

How to read the evidence

Large matched cohort with consistent sensitivity analysis, but retrospective design and shorter CUD follow-up create important interpretive caveats.

When this study was published

Published 2026 using TriNetX multicenter database.

The bigger picture

The dramatically lower pancreatic cancer rate in CUD patients is striking but needs careful interpretation. Shorter follow-up in the CUD group and potential differences in healthcare engagement could partly explain the finding — or cannabinoids may genuinely affect pancreatic carcinogenesis.

Questions still open

Is the lower cancer rate due to biological protection, shorter follow-up, or less healthcare engagement? Could cannabinoids directly inhibit pancreatic carcinogenesis? Would prospective studies with equal follow-up show the same pattern?

Common questions

Could cannabis reduce pancreatic cancer risk?

In this large database study, chronic pancreatitis patients with cannabis use disorder had 74% fewer pancreatic cancer detections. However, shorter follow-up time and potential differences in healthcare engagement in the cannabis group mean this finding needs careful prospective verification.

Does cannabis affect pancreatitis?

The study found cannabis use disorder was associated with a small but significant increase in acute pancreatitis flare-ups (10% higher risk). So while the cancer finding is intriguing, cannabis may not be entirely beneficial for pancreatic health.

Read the original research

Cannabis Use Disorder and Risk of Pancreatic Cancer in Patients with Chronic Pancreatitis: a Multicenter Retrospective Cohort Study.

Journal of gastrointestinal cancer, 57(1), 14

View on PubMed ↗Publisher’s paper ↗

Citation

Maan, Muhammad Hassaan Arif; Maan, Soban; Ahmad, Muhammad Mursaleen; Goyal, Ritik Mahaveer; Khan, Sunnia; Waleed, Muhammad; Qureshi, Imran; Hajifathalian, Kaveh; Al-Khazraji, Ahmed. (2026). Cannabis Use Disorder and Risk of Pancreatic Cancer in Patients with Chronic Pancreatitis: a Multicenter Retrospective Cohort Study.. Journal of gastrointestinal cancer, 57(1), 14. https://doi.org/10.1007/s12029-025-01383-w